Final answer:
The right of way at an intersection usually goes to the car on the right, according to general traffic rules. However, since traffic laws differ depending on location, 'It depends on the traffic rules' is the most accurate option.
Step-by-step explanation:
When two cars pull up to an intersection, the right of way typically goes to the car on the right. This rule applies in many places when the situation is such that both drivers arrive at the intersection at the same time and there is no specific traffic control device (like a stop sign or traffic light) governing the intersection. However, it's essential to understand that traffic laws can vary by country, state, or even city. Hence, the fourth option, which states 'It depends on the traffic rules', is the correct answer. The question asked does not account for variables such as: whether cars travel at the correct speed limit, whether it is safe to cross the road outside of a pedestrian crossing, or factors like the colour of the car. These are irrelevant to determining the right of way. The situation mentions no traffic signals or signs, so it's not analogous to the scenario where a car might proceed through a red light due to an emergency like having a pregnant woman in labor in the back seat. Likewise, road signs can indicate right of way but are not mentioned here, and the assessment of speed when two cars collide is unrelated.